20 cars, 90 passengers, 5 bays. 80 seconds on the clock.
90 waiting
You have 80 seconds, starting at your first tap. A bump costs 3 seconds.
Call the cars to the stop in this order: 8, 19, 5, 7, 9, 17, 20, 18, 13, 14, 16, 10, 4, 15, 2, 12, 3, 6, 1, 11.